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Which of the following element(s) is/are confirmed by appearance of blood red colour with FeCl3 in Lassaigne's test?

Option 1 -

Presence of S only                 

Option 2 -

Presence of N & S

Option 3 -

Presence of N only     

Option 4 -

Presence of P only

0 1 View | Posted 4 weeks ago
Asked by Shiksha User

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    4 weeks ago
    Correct Option - 2


    Detailed Solution:

    Na+ C + N + S ®NaSCN

    Fe3+ + SCN– → [ F e ( S C N ) ] 2 + B l o o d   r e d

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Kindly go through the solution

 

Statement – I : Ellingham diagram explains the kinetics of reduction process.

Statement – II : Hydraulic washing, a method of concentration of ore is based on the differences in gravities of the ore and the gangue.

In the light of above statements choose the correct option among the following.
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Malachite : CuCO3.Cu (OH)2

Azurite : 2CuCO3.Cu (OH)2

Cuprite : Cu2O

Copper pyrite : Cu2S.Fe2S3.

Match List – I with List – II

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           (a) Aluminium                                                                (i) Siderite

           (b) Iron                                                                             (ii) Calamine

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Iron                         -             Siderite

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